Patents by Inventor Masahiro Ikadai
Masahiro Ikadai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11155492Abstract: A cover glass (10) includes a glass layer (16), a viscoelastic layer (12), and an acoustic impedance adjusting layer (14) disposed between the glass layer (16) and the viscoelastic layer (12). When acoustic impedance of the glass layer (16) is Zg, acoustic impedance of the acoustic impedance adjusting layer (14) is Zm, and acoustic impedance of the viscoelastic layer (12) is Zd, the cover glass (10) satisfies a relationship of Zg>Zm>Zd.Type: GrantFiled: August 29, 2017Date of Patent: October 26, 2021Assignee: NIPPON SHEET GLASS COMPANY, LIMITEDInventors: Masahiro Ikadai, Shunji Wada
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Publication number: 20210230052Abstract: The present disclosure provides a glass plate including a main surface having a plurality of minute deformed portions which are recesses or projections, wherein, where an average value of lengths of two sides adjacent to each other of a minimum quadrilateral with four right angles surrounding each minute deformed portion is defined as a dimension, an average value of the dimensions of the plurality of deformed portions is 3.2 to 35.5 ?m. The glass plate satisfies a condition a1 that a ratio of deformed portions A1 having the dimensions of 0.5 to 3.0 ?m with respect to the plurality of deformed portions in terms of number is less than 5%, and/or a condition d1 that a coefficient of variation of the dimensions is 40% or less. This glass plate is suitable for suppressing sparkle and is highly practical, when disposed on an image display device.Type: ApplicationFiled: July 1, 2019Publication date: July 29, 2021Inventors: Masahiro IKADAI, Shinji OIZUMI, Junichi KIRIYAMA, Tsutomu TANOUE
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Publication number: 20190300425Abstract: A cover glass (10) includes a glass layer (16), a viscoelastic layer (12), and an acoustic impedance adjusting layer (14) disposed between the glass layer (16) and the viscoelastic layer (12). When acoustic impedance of the glass layer (16) is Zg, acoustic impedance of the acoustic impedance adjusting layer (14) is Zm, and acoustic impedance of the viscoelastic layer (12) is Zd, the cover glass (10) satisfies a relationship of Zg>Zm>Zd.Type: ApplicationFiled: August 29, 2017Publication date: October 3, 2019Inventors: Masahiro IKADAI, Shunji WADA
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Patent number: 8049860Abstract: A glass substrate for a reflective mirror of a rear projection television (RPTV) which ensures display quality by quantitative control, and can reduce control cost and manufacture cost is provided. A reflective mirror 3 of the rear projection television (RPTV) includes a float glass plate (glass substrate) 1 formed to have a plate thickness of 3 mm by a float process, and a reflection enhancing film 2 constituted of aluminum (Al) formed on one surface 1a of the glass substrate 1 by a sputtering method. In the measurement condition of a cut-off value of 0.8 to 8 mm, the maximum amplitude of a filtered waviness curve is 0.1 ?m or less, the maximum value of a viewability index value ? (=A/D3) in a range of spatial frequencies 2 to 500/mm by spectral analysis of the filtered waviness curve is 0.02 (/m2) or less, and an integral value of the viewability index value ? is 2.0 (/m3) or less.Type: GrantFiled: June 29, 2007Date of Patent: November 1, 2011Assignee: Nippon Sheet Glass Company, Ltd.Inventors: Masahiro Ikadai, Hirohiko Iwase, Naoki Kinugasa
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Publication number: 20110001902Abstract: There is provided a glass substrate for a display device, a liquid crystal display panel, and a liquid crystal display device capable of eliminating the display unevenness of a display panel having undergone the cell assembly and eliminating the need for a post-process or simplifying the post-process. A liquid crystal panel 30 includes two pieces of glass 10 and 32 opposed to each other; a liquid crystal layer 34 injected between the two plates of the glass 10 and 32; and spherical spacers 33a and 33b arranged so as to abut on the respective surfaces of the two pieces of glass 10 and 32. The glass 10 is 1.1 mm in thickness, wherein if a period D of a filtered waviness curve over a spatial frequency range of 2 to 500 lines/mm based on spectral analysis is greater than 20 mm under the measurement condition of a cut-off value of 0.8 to 8 mm, then an amplitude A of the filtered waviness curve is 2 ?m or less, and the amplitude A, when the period D is 20 mm or less, is 18 nm or greater.Type: ApplicationFiled: January 26, 2009Publication date: January 6, 2011Inventors: Masahiro Ikadai, Koji Fujita
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Publication number: 20090323008Abstract: A glass substrate for a reflective mirror of a rear projection television (RPTV) which ensures display quality by quantitative control, and can reduce control cost and manufacture cost is provided. A reflective mirror 3 of the rear projection television (RPTV) includes a float glass plate (glass substrate) 1 formed to have a plate thickness of 3 mm by a float process, and a reflection enhancing film 2 constituted of aluminum (Al) formed on one surface 1a of the glass substrate 1 by a sputtering method. In the measurement condition of a cut-off value of 0.8 to 8 mm, the maximum amplitude of a filtered waviness curve is 0.1 ?m or less, the maximum value of a viewability index value ? (=A/D3) in a range of spatial frequencies 2 to 500/mm by spectral analysis of the filtered waviness curve is 0.02 (/m2) or less, and an integral value of the viewability index value ? is 2.0 (/m3) or less.Type: ApplicationFiled: June 29, 2007Publication date: December 31, 2009Applicant: NIPPON SHEET GLASS COMPANY, LIMITEDInventors: Masahiro Ikadai, Hirohiko Iwase, naoki Kinugasa
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Patent number: 7361963Abstract: An optical film which enables desired optical properties to be obtained easily, and enables the durability to be improved. A metal film 32 is formed on an inner major surface 12a of a glass substrate 12. A plurality of first island structures 33 is formed scattered as islands on an inner major surface 32a of the metal film 32. A plurality of second island structures 31 is formed scattered as islands on the inner major surface 12a of the substrate 12. At least one set of the plurality of first island structures 33 and the plurality of second island structures 31 are made of at least one selected from the group consisting of metals and metal oxides having a different standard electrode potential to a metal of the metal film 32.Type: GrantFiled: December 13, 2005Date of Patent: April 22, 2008Assignee: Nippon Sheet Glass Company, Ltd.Inventor: Masahiro Ikadai
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Publication number: 20060227267Abstract: A substrate for a semi-transmitting type liquid crystal display element, which is capable of suppressing occurrence of display non-uniformity of the semi-transmitting type liquid crystal display element. A reflective mirror is formed by alternately forming in layers at least one first transparent dielectric film and at least one second transparent dielectric film on a transparent substrate. The first and second transparent dielectric films are different in refractive index from each other. The reflective mirror is formed between a liquid crystal section of the semi-transmitting type liquid crystal display element and the transparent substrate, and the first transparent dielectric film is made of a substantially photocatalytically inactive compound.Type: ApplicationFiled: April 10, 2006Publication date: October 12, 2006Applicant: Nippon Sheet Glass Company, LimitedInventors: Masahiro Ikadai, Etsuo Ogino
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Publication number: 20060159950Abstract: A sputtering target according to the invention including an oxide sintered body containing NbOx and TiOx in which the abundance ratio of Ti atoms in the target is from 70% to 90% both inclusively. Preferably, the oxide sintered body has a specific resistance value not higher than 10?·cm. Preferably, theoxidesinteredbody has a thermal expansion coefficient not larger than 7 ×10?6/K and a thermal conductivity not lower than 10 ×10?4 cal/mm-K-sec.Type: ApplicationFiled: December 14, 2005Publication date: July 20, 2006Inventors: Terufusa Kunisada, Etsuo Ogino, Masahiro Ikadai
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Publication number: 20060127604Abstract: An optical film which enables desired optical properties to be obtained easily, and enables the durability to be improved. A metal film 32 is formed on an inner major surface 12a of a glass substrate 12. A plurality of first island structures 33 is formed scattered as islands on an inner major surface 32a of the metal film 32. A plurality of second island structures 31 is formed scattered as islands on the inner major surface 12a of the substrate 12. At least one set of the plurality of first island structures 33 and the plurality of second island structures 31 are made of at least one selected from the group consisting of metals and metal oxides having a different standard electrode potential to a metal of the metal film 32.Type: ApplicationFiled: December 13, 2005Publication date: June 15, 2006Applicant: Nippon Sheet Glass Company, Ltd.Inventor: Masahiro Ikadai
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Patent number: 6803973Abstract: A substrate for reflection type liquid crystal display elements is provided, which has a multilayer dielectric film (reflective mirror) which can have fewer layers than according to the conventional art and can thus be formed in a shorter time, and which can stably obtain an optical characteristic of a desired flatness across the visible region, and moreover can prevent the occurrence of coloring due to reflection. The reflective mirror is formed on top of a transparent substrate, and is comprised of a predetermined number of high-refractive-index first transparent films and low-refractive-index second transparent films laminated alternately on the transparent substrate. Either or both of the first transparent films and the second transparent films are arranged such that the film thickness thereof increases progressively or decreases progressively with distance from the transparent substrate.Type: GrantFiled: June 7, 2001Date of Patent: October 12, 2004Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Etsuo Ogino, Masahiro Ikadai
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Patent number: 6780290Abstract: The prevent invention improves the film thickness distribution in the direction of revolution of substrates by a simple manner in a method for forming coating films, wherein a evaporating source 3 is disposed at a predetermined distance from substrates 2, and when a coating film material is applied from the evaporating source 3 onto the substrate surfaces while revolving the substrates 2, coating films are formed on the substrate surfaces in a condition where the radius of curvature of the substrates 2 obtained by bending the substrates 2 within the elasticity range is made equal to the radius of revolution of the substrates 2.Type: GrantFiled: February 3, 2003Date of Patent: August 24, 2004Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Masahiro Ikadai, Etsuo Ogino
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Publication number: 20030132101Abstract: The prevent invention improves the film thickness distribution in the direction of revolution of substrates by a simple manner in a method for forming coating films, wherein a evaporating source 3 is disposed at a predetermined distance from substrates 2, and when a coating film material is applied from the evaporating source 3 onto the substrate surfaces while revolving the substrates 2, coating films are formed on the substrate surfaces in a condition where the radius of curvature of the substrates 2 obtained by bending the substrates 2 within the elasticity range is made equal to the radius of revolution of the substrates 2.Type: ApplicationFiled: February 3, 2003Publication date: July 17, 2003Applicant: NIPPON SHEET GLASS CO., LTD.Inventors: Masahiro Ikadai, Etsuo Ogino
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Publication number: 20020071075Abstract: A substrate for reflection type liquid crystal display elements is provided, which has a multilayer dielectric film (reflective mirror) which can have fewer layers than according to the conventional art and can thus be formed in a shorter time, and which can stably obtain an optical characteristic of a desired flatness across the visible region, and moreover can prevent the occurrence of coloring due to reflection. The reflective mirror is formed on top of a transparent substrate, and is comprised of a predetermined number of-high-refractive-index first transparent films and low-refractive-index second transparent films laminated alternately on the transparent substrate. Either or both of the first transparent films and the second transparent films are arranged such that the film thickness thereof increases progressively or decreases progressively with distance from the transparent substrate.Type: ApplicationFiled: June 7, 2001Publication date: June 13, 2002Inventors: Etsuo Ogino, Masahiro Ikadai
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Patent number: 5582919Abstract: In a conductive antireflection film having predetermined optical characteristics, of the layers of the conductive antireflection film, two layers located on the transparent substrate side are replaced with a three-layered film having a metal oxide film as an intermediate layer thereof. In this three-layered film when k.sub.i =4n.sub.i d.sub.i .lambda..sub.0 (where n.sub.i is the refractive index of the ith layer, di is the geometric thickness of the ith layer, and .lambda..sub.0 is a middle wavelength in design), the metal oxide film as the second layer satisfies k.sub.2 .gtoreq.0.01, and an ITO film as the first layer satisfies k.sub.1 .gtoreq.0.1.Type: GrantFiled: May 26, 1995Date of Patent: December 10, 1996Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Masahiro Ikadai, Kazuhiko Fujimaki, Etsuo Ogino, Yasunori Taninaka, Ayako Soejima
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Patent number: 5536580Abstract: In a conductive antireflection film having predetermined optical characteristics, of the layers of the conductive antireflection film, two layers located on the transparent substrate side are replaced with a three-layered film having a metal oxide film as an intermediate layer thereof. In this three-layered film, when k.sub.i =4n.sub.i d.sub.i /.lambda..sub.0 (where n.sub.i is the refractive index of the ith layer, di is the geometric thickness of the ith layer, and .lambda..sub.0 is a middle wavelength in design), the metal oxide film as the second layer satisfies k.sub.2 .gtoreq.0.01, and an ITO film as the first layer satisfies k.sub.1 .gtoreq.0.1.Type: GrantFiled: February 22, 1994Date of Patent: July 16, 1996Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Masahiro Ikadai, Kazuhiko Fujimaki, Etsuo Ogino, Yasunori Taninaka, Ayako Soejima